with pumping-cylinder axis arranged at an angle to working-cylinder axis, e.g. at an angle of 90 degrees

Full Title

Engines characterised by provision of pumps for charging or scavenging > Engines with reciprocating-piston pumps; Engines with crankcase pumps > with reciprocating-piston pumps other than simple crankcase pumps > with pumping-cylinder axis arranged at an angle to working-cylinder axis, e.g. at an angle of 90 degrees